Microsoft SQL server 2016
How to test import only 10 rows from a text file, with bulk insert command? To check if it works.
BULK INSERT Salestable FROM 'C:\temp\data.txt' WITH (LASTROW = 10, BATCHSIZE=250000, MAXERRORS=2);
Enter LASTROW = 10 to only read ten rows of data from your data.txt file. Then you can check if you get the correct type of data to your table.
LASTROW = last_row
Specifies the number of the last row to load. The default is 0, which indicates the last row in the specified data file.
MAXERRORS = max_errors
Specifies the maximum number of syntax errors allowed in the data before the bulk-import operation is canceled. Each row that can’t be imported by the bulk-import operation is ignored and counted as one error. If max_errors isn’t specified, the default is 10.
BATCHSIZE = batch_size
Specifies the number of rows in a batch. Each batch is copied to the server as one transaction. If this fails, SQL Server commits or rolls back the transaction for every batch. By default, all data in the specified data file is one batch.
If you cancel a BULK INSERT, it will try to roll back all data, this will take time.